package com.atguigu.eduservice.service.impl;

import com.alibaba.excel.EasyExcel;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.entity.subject.OneSubject;
import com.atguigu.eduservice.entity.subject.TwoSubject;
import com.atguigu.eduservice.listener.SubjectExcelListener;
import com.atguigu.eduservice.mapper.EduSubjectMapper;
import com.atguigu.eduservice.service.EduSubjectService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * 课程科目 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2020-10-19
 */
@Service
public class EduSubjectServiceImpl extends ServiceImpl<EduSubjectMapper, EduSubject> implements EduSubjectService {

    //添加课程分类
    @Override
    public void saveSubject(MultipartFile file,EduSubjectService eduSubjectService) {
        try {
            //文件输入流
            InputStream in = file.getInputStream();
            //调用方法进行读取
            EasyExcel.read(in,SubjectData.class,new SubjectExcelListener(eduSubjectService)).sheet().doRead();

        }catch (Exception e){
            e.printStackTrace();
        }


    }

    @Override
    public List<OneSubject> getAllOneTwoSubject() {
        //1 查询所有的一级分类
        QueryWrapper<EduSubject> wrapperOne = new QueryWrapper<>();
        wrapperOne.eq("parent_id",0);
        List<EduSubject> oneSubjectList = baseMapper.selectList(wrapperOne);
        //2 查询所有的二级分类
        QueryWrapper<EduSubject> wrapperTwo = new QueryWrapper<>();
        wrapperTwo.ne("parent_id","0");
        List<EduSubject> twoSubjectList = baseMapper.selectList(wrapperTwo);
        //创建一个集合，用于封装数据
        List<OneSubject> finalSubjectList = new ArrayList<>();
        //封装一级分类
        for (EduSubject eduSubject: oneSubjectList){
            OneSubject oneSubject = new OneSubject();

//            oneSubject.setId(eduSubject.getId());
//            oneSubject.setTitle(eduSubject.getTitle());
            BeanUtils.copyProperties(eduSubject,oneSubject);

            finalSubjectList.add(oneSubject);
        }
        //封装二级分类
        for(EduSubject twoSubject:twoSubjectList){
            TwoSubject subject = new TwoSubject();
            subject.setId(twoSubject.getId());
            subject.setTitle(twoSubject.getTitle());
            for(OneSubject oneSubject:finalSubjectList){
                if(oneSubject.getId().equals(twoSubject.getParentId()) || oneSubject.getId() == twoSubject.getParentId() ){
                    List<TwoSubject> children = oneSubject.getChildren();
                    children.add(subject);
                }
            }

        }
        return finalSubjectList;
    }
}
